.bottom {
    width: 100vw;
    height: 80px;
    display: flex;
    bottom: 0;
    position: fixed;
    background-color: #2f2f2f;
}
.bottom-audio {
    width: 500px;
    height: 80px;
    position: relative;
    display: block;
    border-radius: 0;
    margin: 0 auto;
}
audio {
    display: block;
    width: 100%;
    height: 50px;
    position: relative;
    margin-top: 15px;
}
